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[ARTICLE · art-119907] src=github.com ↗ pub= topic=developer-tools verified=true sentiment=· neutral

Claude Code skill: no emdashes

Frederik Wouters released a Claude Code skill that blocks em dashes from Claude responses, injecting a rule before every turn and forcing a rewrite if any of seven forbidden dash characters appear. The skill is installed via the woutersf/woutersf-marketplace plugin and uses UserPromptSubmit and Stop hooks plus a /no-emdashes slash command.

read1 min views1 publishedSep 3, 2026
Claude Code skill: no emdashes
Image: Michielbdejong (auto-discovered)

Blocks em dashes from Claude responses. Injects the rule before every turn and forces a rewrite if one slips through.

Background and the why behind it: Claude skill: no emdashes.

/plugin marketplace add woutersf/woutersf-marketplace
/plugin install no-emdashes@woutersf-marketplace

UserPromptSubmit

hook: injects the no-dash rule into every conversation turnStop

hook: scans the response; if a forbidden character is found, blocks Claude and forces a rewrite/no-emdashes

: slash command for an on-demand check

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(U+2014, U+2013, U+2015, U+2E3A, U+2E3B, U+FE58, U+2012)

  • Claude Code CLI
  • Python 3

Made by Frederik Wouters.

source & further reading
github.com — original article Show HN: Brb – A Claude Code plugin for adhdmaxxing PromptSonar – Execution path analyzer for AI agents and MCP servers Show HN: Review-to-rule – Turn accepted review feedback into durable repo rules
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